True: Covalent network substances have high melting and boiling points, Ionic compounds are all solid at room temperature., Covalent molecular substances can be solid, liquid or gas at room temperature., Ionic compounds conduct electricity when molten or in solution., Covalent molecular substances never conduct electricity., Ionic compounds conduct electricity when molten or in solution because the ions are free to move., When a covalent network melts, strong covalent bonds are broken., When a covalent molecular substance melts, weak intermolecular forces are broken., When an ionic compound melts, ionic bonds are broken., Covalent network compounds are insoluble in water., Ionic compounds do not conduct electricity when solid., False: Covalent network substances have low melting and boiling points, Covalent molecular substances are all solid at room temperature., Ionic substances can be solid, liquid or gas at room temperature., Ionic compounds never conduct electricity., Ionic compounds conduct electricity when solid., Covalent substances conduct electricity when molten or in solution., When a covalent molecular susbtance melts, strong covalent bonds are broken., Silicon carbide is an example of an ionic compound., Sodium chloride is an example of a covalent molecular substance.,
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Properties of Ionic and Covalent Substances
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